[Ocfs2-devel] [PATCH] ocfs2: give an obvious tip for dismatch cluster names

[Joseph Qi]

Hi Gang,

How can we confirm EBADR is only because cluster name mismatch?
Since the cluster stack may be o2cb(o2dlm) or user(fsdlm).

Thanks,
Joseph

On 17/5/18 14:35, Gang He wrote:
> This patch is used to add an obvious error message, due to
> dismatch cluster names between on-disk and in the current cluster.
> We can meet this case during OCFS2 cluster migration, if we can
> give the user an obvious tip for why they can not mount the file
> system after migration, they can quickly fix this dismatch problem.
> Second, also move printing ocfs2_fill_super() errno to the front
> of ocfs2_dismount_volume() function, since ocfs2_dismount_volume()
> will also print it's own message.
> 
> Signed-off-by: Gang He <ghe at suse.com>
> ---
>  fs/ocfs2/super.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
> index ca1646f..5575918 100644
> --- a/fs/ocfs2/super.c
> +++ b/fs/ocfs2/super.c
> @@ -1208,14 +1208,15 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
>  read_super_error:
>  	brelse(bh);
>  
> +	if (status)
> +		mlog_errno(status);
> +
>  	if (osb) {
>  		atomic_set(&osb->vol_state, VOLUME_DISABLED);
>  		wake_up(&osb->osb_mount_event);
>  		ocfs2_dismount_volume(sb, 1);
>  	}
>  
> -	if (status)
> -		mlog_errno(status);
>  	return status;
>  }
>  
> @@ -1843,6 +1844,9 @@ static int ocfs2_mount_volume(struct super_block *sb)
>  	status = ocfs2_dlm_init(osb);
>  	if (status < 0) {
>  		mlog_errno(status);
> +		if (status == -EBADR)
> +			mlog(ML_ERROR, "couldn't mount because cluster name on"
> +			" disk does not match the running cluster name.\n");
>  		goto leave;
>  	}
>  
>